package com.lagou.dao.impl;

import com.lagou.dao.CourseDao;
import com.lagou.pojo.Course;
import com.lagou.utils.DruidUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

/**
 * 课程模块 DAO层的实现类
 */
public class CourseDaoImpl implements CourseDao {

    @Override
    public List<Course> findCourseList() {
        List<Course> courseList = null;

        try {
            // 1.创建QueryRunner
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            // 2.编写sql 判断是否删除 取出is_del = 0 的数据，未删除的数据
            String sql = "SELECT\n" +
                    "id,\n" +
                    "course_name,\n" +
                    "price,\n" +
                    "sort_num,\n" +
                    "`status`\n" +
                    "FROM course WHERE is_del = ?";

            // 3.执行查询
            courseList = qr.query(sql, new BeanListHandler<Course>(Course.class), 0);
        } catch (SQLException e) {
            e.printStackTrace();
        }

        return courseList;
    }

    // 根据条件查询课程信息
    @Override
    public List<Course> findByCourseNameAndStatus(String courseName, String status) {
        List<Course> courseList = null;

        try {
            // 1.创建QueryRunner
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            // 2.编写sql 当前的查询为多条件不定项查询
            // 2.1 创建StringBuffer 对象，将sql字符串 添加进缓冲区
            StringBuffer sb = new StringBuffer("SELECT id,course_name,price,sort_num,`status`FROM course WHERE 1 = 1 AND is_del = ? ");

            // 2.2 创建list集合 保存参数
            List<Object> list = new ArrayList<>();
            list.add(0);

            // 2.3 判断传入的参数是否为空
            if (courseName != null && !"".equals(courseName)) {
                sb.append("AND course_name LIKE ?");
                // like查询 需要拼接 %
                courseName = "%" + courseName + "%";
                // 将条件放进list集合
                list.add(courseName);
            }

            if (status != null && !"".equals(status)) {
                sb.append("AND `status` = ?");
                // 将status 转换为int
                int i = Integer.parseInt(status);
                list.add(i);
            }

            // 执行查询
            courseList = qr.query(sb.toString(), new BeanListHandler<Course>(Course.class), list.toArray());
        } catch (SQLException e) {
            e.printStackTrace();
        }

        return courseList;
    }

    // 保存课程营销信息
    @Override
    public int saveCourseSalesInfo(Course course) {
        int row = 0;

        try {
            // 1.创建QueryRunner
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            // 2.编写sql
            String sql = "INSERT INTO course(\n" +
                    "course_name,\n" +
                    "brief,\n" +
                    "teacher_name,\n" +
                    "teacher_info,\n" +
                    "preview_first_field,\n" +
                    "preview_second_field,\n" +
                    "discounts,\n" +
                    "price,\n" +
                    "price_tag,\n" +
                    "share_image_title,\n" +
                    "share_title,\n" +
                    "share_description,\n" +
                    "course_description,\n" +
                    "course_img_url,\n" +
                    "`status`,\n" +
                    "create_time,\n" +
                    "update_time\n" +
                    ") VALUES(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)";

            // 3.准备参数
            Object[] param = {course.getCourse_name(),course.getBrief(),course.getTeacher_name(),course.getTeacher_info(),course.getPreview_first_field(),course.getPreview_second_field(),course.getDiscounts(),course.getPrice(),course.getPrice_tag(),course.getShare_image_title(),course.getShare_title(),course.getShare_description(),course.getCourse_description(),course.getCourse_img_url(),course.getStatus(),course.getCreate_time(),course.getUpdate_time()};

            // 4.执行插入操作
            row = qr.update(sql, param);
        } catch (SQLException e) {
            e.printStackTrace();
        }

        return row;
    }

    // 根据ID查询课程信息
    @Override
    public Course findCourseById(int id) {

        Course course = null;
        try {
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            String sql = "SELECT\n" +
                    "id,\n" +
                    "course_name,\n" +
                    "brief,\n" +
                    "teacher_name,\n" +
                    "teacher_info,\n" +
                    "preview_first_field,\n" +
                    "preview_second_field,\n" +
                    "discounts,\n" +
                    "price,\n" +
                    "price_tag,\n" +
                    "course_img_url,\n" +
                    "share_image_title,\n" +
                    "share_title,\n" +
                    "share_description,\n" +
                    "course_description,\n" +
                    "`status`\n" +
                    "FROM course WHERE id = ?";

            course = qr.query(sql, new BeanHandler<Course>(Course.class), id);
        } catch (SQLException e) {
            e.printStackTrace();
        }

        return course;
    }

    // 修改课程营销信息
    @Override
    public int updateCourseSalesInfo(Course course) {

        int row = 0;
        try {
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            String sql = "UPDATE course SET\n" +
                    "course_name = ?,\n" +
                    "brief = ?,\n" +
                    "teacher_name = ?,\n" +
                    "teacher_info = ?,\n" +
                    "preview_first_field = ?,\n" +
                    "preview_second_field = ?,\n" +
                    "discounts = ?,\n" +
                    "price = ?,\n" +
                    "price_tag = ?,\n" +
                    "share_image_title = ?,\n" +
                    "share_title = ?,\n" +
                    "share_description = ?,\n" +
                    "course_description = ?,\n" +
                    "course_img_url = ?,\n" +
                    "update_time = ?\n" +
                    "WHERE id = ?";

            Object[] param = {course.getCourse_name(),course.getBrief(),course.getTeacher_name(),course.getTeacher_info(),course.getPreview_first_field(),course.getPreview_second_field(),course.getDiscounts(),course.getPrice(),course.getPrice_tag(),course.getShare_image_title(),course.getShare_title(),course.getShare_description(),course.getCourse_description(),course.getCourse_img_url(),course.getUpdate_time(),course.getId()};

            row = qr.update(sql, param);
        } catch (SQLException e) {
            e.printStackTrace();
        }

        return row;
    }

    // 修改课程状态
    @Override
    public int updateCourseStatus(Course course) {

        int row = 0;
        try {
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            String sql = "UPDATE course SET `status` = ?, update_time = ? WHERE id = ?";

            Object[] param = {course.getStatus(),course.getUpdate_time(),course.getId()};

            row = qr.update(sql, param);

        } catch (SQLException e) {
            e.printStackTrace();
        }

        return row;
    }
}
